Mitsuharu SHIWA
著者に関連した記事は3件です。
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第1回
交流磁化プローブを用いた鋳造構造物の材質評価
著者:
Luca BARTOLOMEO,Hisashi ENDO,Tetsuya UCHIMOTO,Mitsuharu SHIWA,Toshiyuki TAKAGI
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AC magnetization method ductile cast iron foundry material hardness evaluation
Luca BARTOLOMEO,Hisashi ENDO,Tetsuya UCHIMOTO,Mitsuharu SHIWA,Toshiyuki TAKAGI
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AC magnetization method ductile cast iron foundry material hardness evaluation
This paper studies a method of non-destructive evaluation for the hardness of ductile cast irons employing an AC magnetization probe that evaluates the differences in magnetization characteristics. The analysis of the waveform obtain ed from the probe on the ductile cast iron specimens performs estimating their hardness since mechanical properties are strongly related to two factors: the graphite shape matrices mainly composed of pearlite and ferrite. The wavefor ms around Rayleigh region yield the essenti...
英字タイトル:
Foundry Material Property Evaluation Employing AC Magnetization Probe
英字タイトル:
Foundry Material Property Evaluation Employing AC Magnetization Probe
論文
渦電流探傷における欠陥形状復元のための新しい信号処理法
著者:
兼本 茂,Shigeru KANEMOTO,程 衛英,Weiying CHENG,志波 光晴,Mitsuharu SHIWA,古村 一朗,Ichiro KOMURA
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Deconvolution Filter Eddy Current Test Line Spread Function Linear Discriminant Analysis Point Spread Function SCC
兼本 茂,Shigeru KANEMOTO,程 衛英,Weiying CHENG,志波 光晴,Mitsuharu SHIWA,古村 一朗,Ichiro KOMURA
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Deconvolution Filter Eddy Current Test Line Spread Function Linear Discriminant Analysis Point Spread Function SCC
This study proposes new signal processing methods to restore surface shapes of flaws from eddy current testing（ECT）signals. A linear discriminant analysis method is applied to ECT signals embedded in multi-dimensional state space to identify flaw signals form background noises in prior. A new concept of equivalent point spread function is introduced, and the real flaw shape is restored by utilizing a deconvolution filter based on Richardson-Lucy algorithm. An EDM notch covered by large welding noises...
英字タイトル:
New Signal Processing Methods for Surface Shape Restoration in Eddy Current
英字タイトル:
New Signal Processing Methods for Surface Shape Restoration in Eddy Current
論文
部分接触SCCの渦電流探傷による新しい深さサイジング法
著者:
兼本 茂,Shigeru KANEMOTO,程 衛英,Weiying CHENG,志波 光晴,Mitsuharu SHIWA,古村 一朗,Ichiro KOMURA
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Depth Sizing Eddy Current Test SCC
兼本 茂,Shigeru KANEMOTO,程 衛英,Weiying CHENG,志波 光晴,Mitsuharu SHIWA,古村 一朗,Ichiro KOMURA
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Depth Sizing Eddy Current Test SCC
A partial-contact stress corrosion crack (SCC) is electrically modeled as a crack region with non-zero conductivity in eddy current testing (ECT). This partial-contact effect is excluded by an optimally designed crack-conductivity-insensitive depth sizing index, and consequently the master curves obtained from electric-discharge machining (EDM) notches can be utilized directly in the depth sizing of SCCs. This approach is numerically validated and applied to the characterization of SCCs in SUS304 from...
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A New Depth Sizing Method for Partial-Contact Stress Corrosion Cracks from ECT Signals
英字タイトル:
A New Depth Sizing Method for Partial-Contact Stress Corrosion Cracks from ECT Signals